<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>021-引用数据类型.html</title>
</head>
<body>
	
</body>
<script>
	var a = document;
	console.log(typeof a);

	var b ={
		name:"tom",
		age:18,
	}
	console.log(typeof b);
	
	var c={

	}
	console.log(typeof c);

	var d=null;
	console.log(typeof d);

	function sayHi(){
		console.log('hi');
	}
	console.log(typeof sayHi);
	var arr = [1,2,3]
	console.log(typeof arr);
</script>
</html>